pcap_can_set_rfmon() returns 0 if monitor mode could not be set, 1 if
monitor mode could be set, and a negative value on error. A negative
return value indicates what error condition occurred. The possible
error values are:
The capture source specified when the handle was created
The process doesn't have permission to check whether monitor
mode could be supported.
The capture handle has already been activated.
Another error occurred. pcap_geterr() or pcap_perror() may be
called with p as an argument to fetch or display a message
describing the error.
Additional error codes may be added in the future; a program should
check for 0, 1, and negative, return codes, and treat all negative
return codes as errors. pcap_statustostr() can be called, with a
warning or error code as an argument, to fetch a message describing
the warning or error code.
This page is part of the libpcap (packet capture library) project.
Information about the project can be found at
⟨http://www.tcpdump.org/⟩. If you have a bug report for this manual
page, see ⟨http://www.tcpdump.org/#patches⟩. This page was obtained
from the project's upstream Git repository
⟨https://github.com/the-tcpdump-group/libpcap.git⟩ on 2017-04-25. If
you discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for the
page, or you have corrections or improvements to the information in
this COLOPHON (which is not part of the original manual page), send a
mail to email@example.com
3 January 2014 PCAP_CAN_SET_RFMON(3PCAP)